Rename hasher to hash_to_curve.

src/arithmetic/curves.rs

@@ -83,7 +83,7 @@ pub trait Curve:
     /// distributed elements in the group, given domain prefix `hasher`.
     ///
     /// This method is suitable for use as a random oracle.
-    fn hasher(domain_prefix: &str) -> Box<dyn Fn(&[u8]) -> Self + 'static>;
+    fn hash_to_curve(domain_prefix: &str) -> Box<dyn Fn(&[u8]) -> Self + 'static>;
 
     /// Returns whether or not this element is on the curve; should
     /// always be true unless an "unchecked" API was used.

src/pasta/curves.rs

@@ -686,7 +686,7 @@ macro_rules! new_curve_impl {
 
 macro_rules! impl_projective_curve_specific {
     ($name:ident, $name_affine:ident, $iso_affine:ident, $base:ident, special_a0_b5) => {
-        fn hasher(domain_prefix: &str) -> Box<dyn Fn(&[u8]) -> Self + 'static> {
+        fn hash_to_curve(domain_prefix: &str) -> Box<dyn Fn(&[u8]) -> Self + 'static> {
             use super::hashtocurve;
 
             let domain_separation_tag: String = format!(
@@ -777,7 +777,7 @@ macro_rules! impl_projective_curve_specific {
     };
     ($name:ident, $name_affine:ident, $iso_affine:ident, $base:ident, general) => {
         /// Unimplemented: hashing to this curve is not supported
-        fn hasher(_domain_prefix: &str) -> Box<dyn Fn(&[u8]) -> Self + 'static> {
+        fn hash_to_curve(_domain_prefix: &str) -> Box<dyn Fn(&[u8]) -> Self + 'static> {
             unimplemented!()
         }
 

src/pasta/pallas.rs

@@ -24,7 +24,7 @@ pub type IsoAffine = IsoEpAffine;
 fn test_map_to_curve_pallas() {
     use crate::arithmetic::Curve;
 
-    let hash = Point::hasher("z.cash:test");
+    let hash = Point::hash_to_curve("z.cash:test");
     let p: Point = hash(b"hello");
     let (x, y, z) = p.jacobian_coordinates();
     println!("{:?}", p);

src/pasta/vesta.rs

@@ -24,7 +24,7 @@ pub type IsoAffine = IsoEqAffine;
 fn test_map_to_curve_vesta() {
     use crate::arithmetic::Curve;
 
-    let hash = Point::hasher("z.cash:test");
+    let hash = Point::hash_to_curve("z.cash:test");
     let p: Point = hash(b"hello");
     let (x, y, z) = p.jacobian_coordinates();
     println!("{:?}", p);